<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>边框测试</title>
    <style>
        div{
            border-top: deeppink solid;
            border-left: blue solid;
            border-right: red solid;
            border-bottom: aqua solid;
            width: 150px;
            height: 150px;

        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>